Re: [Gnue-dev] type (not class) in .gcd files

[Neil Tiffin]

> In packages/base/currency/classes/currency/currency.gcd, there is:
>
>   # -------------------------------------------------------------------------
>   # money - TYPE definition of money.
>   # -------------------------------------------------------------------------
>   type money
>
> What is special about types? As they have no methods and are just
> replaced instead of a type definition mentioning them, how are they
> stored? In data columns in the table for the class of which they are a
> a member?

types are expanded in a way that the type definition disappears and 
the data definitions are inserted directly into the object.  They 
were a shorthand for assuring consistent usage of groups of data 
definitions such that they would be consistent throughout the design 
(by only being defined once.) Therefore if the base design (type) was 
changed it would automatically be changed throughout.

Neil
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